package com.hmdp.utils;
import com.hmdp.dto.UserDTO;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
//拦截器实现登录校验
public class LoginInterceptor implements HandlerInterceptor {


    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
      //判断是否需要拦截 判断登陆状态
        UserDTO user = UserHolder.getUser();
        if (user==null){
            response.setStatus(401);
            return false;
        }

        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        UserHolder.removeUser();
    }
}
